Chain and lock combination



Nov. 24, 1936. s. ENGEL CHAIN AND LOCK COMBINATION Filed March 25, 1955V v 2 5 11 a SYLVAN ENGEL.

INVENTOR ATTORNEY Patented Nov. 24, 1936 UNITED STATES zteztzt PATENTOFFICE 12 Claims.

My invention relates to chain locks. and in more detail, to acombination of a lock with a chain attached which functions on a doorpermitting the door to be opened partially on a twist of the lock knobin one direction and then permitting the door to be opened fully on areverse twist of the knob.

At present there is no structure combining the locking and barringfunctions in a single unit, whereby a single actionable releasingmechanism functions to release both the locking and barring meansindividually and consecutively by reverse movements of the releasingmeans. There is, however, a chain bar which is made up of a chainattached to the jamb of the door frame and the other end of the chain issupplied with a grooved element suitable for sliding in a way in thedoor. This chain bar must be left released normally in order to permit aperson to open the door from the outside and it must be released inorder to open the door from the inside when permitting a person toenter. Thus, the chain must be left or placed in a detached positionalmost continually and often results in a lack of protection when it ismost needed. In addition to the above type of looking and barringmechanisms there is a type comprising a combination, a locking andbarring unit which is controlled by two releasing mechanisms, one ofwhich releases the locking means and the other, the barring means. Thistype is not foolproof because the releasing of the barring means canalso release the locking means. In addition this mechanism requires theuse of both hands and is constructed with a complexity of parts notpresent in the described and claimed structure below.

The purpose of my invention is to provide a combined lock and chainwhich functions in such a way that the door to which it is attachedcannot be opened from the inside unless the chain is in a position tofunction.

A further object of my invention is to provide a combined chain and lockwhich will permit the door to which it is attached to be opened from theinside only to the extent of the chain on the initial turning of thelock knob and will release the chain and permit the door to be openedcompletely on a further turning of the knob in a second direction.

Another object of my invention is to provide a chain and lockcombination which, when attached to a door, will permit the door to beopened from the inside only to the length of the chain on the initialturning of the lock knob,

but which will allow the door to be opened completely from the outsideby turning the key to the proper opening position.

A further object of my invention is to provide a lock and chaincombination for a door in which the chain automatically immediatelyassumes a position from which it will function on the closing of thedoor.

I accomplish these and other objects by pro viding a lock for a doorcomprising two tongues operated by arms on a knob in such a way thatwhen the knob is turned in the one direction it releases the tongue heldin a locking groove on the door jamb and when the knob is turned in theopposite direction it releases the other tongue which has been held inone end of a chain, the other end of the chain being permanentlyfastened to the door jamb.

Further and more specific objects, features and advantages will moreclearly appear from the detailed description given below taken inconnection with the accompanying sheet of drawings which forms a part ofthis specification.

Figure 1 is a plan view of my lock with the cover piece removed; Fig. 2is a section along the line 2-2 of Fig. 1; and Fig. 3 is a sectiongenerally along the line 3--3 of Fig. 1 showing the door opened and thelock operating with the chain extended.

In the drawing, my locking device is constructed in two parts, the firstpart 3 is secured to the door and the other part 4 is secured to thedoor jamb 2. The part 3 which contains the locking and moving mechanismcomprises the base plate 5 on which the moving mechanism 6 rests whichcloses and opens the lock, the cam parts 1 which permit a key to openthe look without the chain functioning, and the knob and covering part8.

A base platform 9 raises and supports the part 3 carrying the lockingand moving mechanism at a height so that part of the base plate withpart of its moving mechanism extends over the part 4 attached to thedoor jamb. This base platform 9 extends around the edges only of thepart 3 and can be eliminated if the part 4 is countersunk into the doorjamb.

The base plate 5 is constructed with side walls it which guide themoving mechanism 6 and is provided near its tail end with an opening I land near its head end with openings l2 which are positioned directlyover the part 4 attached to the door jamb. The purpose for which theopenings H and i2 are to be used will be described hereinafter.

The moving mechanism 6 comprises two tongues or plates I3 which rest onthe base plate, the front ends M of the plates extending part way overthe openings 12. At about the mid part each plate is provided with a pin15 and near their rear end the plates are provided with the pins IS. Theplates are also provided with a cut out portion I1 which corresponds toand is directly over the opening I I in the base plate. The pins l6 areto the rear of and near the out out portion. [1. The front ends 14 ofthe plates .are beveled so as to slide over extensions on the part 4attached to the door jamb. The inner sides of the plates rest adjacenteach other and the outer sides are near the side walls IU of the baseplate, thus each plate can slide back an'd-'forth in a way formed by oneside wall l and theside of the other plate.

The cam i 8 is placed above the plates and is provided with aneccentrically placed .stem' H) which extends through the cut out part llof the plates andzthrough'theaopening ll .inthebas'e iplate. lI'herendof this stem is provided with an elongated opening 20. "The. cam ispositioned near the pinsylfi so that on'theturning of the cam its aedge,strikesstherpins vand;forces the plates backxward. 'Asthe pinsarerplaced close together they .;are struck rpractically simultaneouslyand the plates will move backward almost'together.

iIoxturn-the cam l8,a cylinder lock 2| on the routersside of 'therdooris'provided with an extension piece or extension bar 22 whichextendsfrom the lock -barrel intothe shaped opening 20. Thus :byturningthe extension piece of the lock the cam turns and the pins l6.are struck to-force' back the plates or'tongues I3. -Iniorder for thecylinder ilo'ck tolfunctionteasily'withzthe cam said lock iscenterednin'linewith the stem l9 about which the cam turns.

.ZIhe-rcoveringpart '8 comprises 'accover plate 23 vwhichcextends overthe-base plate and its side In and forms-the outsideof thezpart'3 of thedevice. This-coversisprovidedionits outer side with a knob :24*whic hhasa stem or shaft projecting :through the cover to theinsidexofthepart-"3: and iformingqthe extension or, rollbaoktZS.

Ilhis:extensionisprovided with the side extendxing arms6*whicharerclose'toand capable of istrikingtheipins l'5 .when the knob 24 is turned inreverse directions. on :each :plate a littleito the 'back of and one on:eithersideof the knob and its extension-so that 'theiturningrof itheknob to the right releases or IIOITGfiS bECkOIIGTOf theplates ortonguesand the :turning of the knob to theleft forces back the other tongue orplate. As a continuous turn in :one direction forces one plate backandfthe other [forward both plates can onlyabe forcedlbackwardbyra-reversal of'ithe:direction of turning of the .knob.

A piece ZTpIaced-at the front end of 'the part 3 .is-provided withalraised part- 28 and with an extendinglip'i 9. Theextending lip restsjust high :enough above the base :plate to permit the tongues I3 toslide'back and forth. The raised :part -29 extends from the front of thedevice to the rear of the openings l2 and'forms a'box like encasement'30.

Twopins3l are placedonthelippart 29 and carry coiledsprings 32 which arefixed at their 'otherends to the pins l5 on the plates'ortongues. rAsthe pinsfi3'l on the lip part are to the front of the pins l5 on thertongues the tongues are forced-forward toward and into the box part 30and partly over the openings l2 in the base plate. The plateacan neverbeiforced m re tha ha f.

The pins 15 are placed onepands 'on the opening of the door.

holdingthe chain head piece. "door from the inside the knob must beturned, the

way over the openings 12 as in this position the springs become closedand occupy the complete distance between the pins l5 and 3!.

Thus the part 3 of the device has two tongues which extend normally partway over the openings l2 in the base plate but which can be forcedbackward in either of two ways. The first is by turning the key in thelock on the outer side of the door and forcing both tongues back at thesame time; and the second is by turning in two directions the knob onthe inner side of the door and forcing back each tongue individually.

The part 4 fixed on the door jamb comprises a case 33 carrying inside ita spring 34 and a chain 35' ancl a stop piece or latch block 36 fixed onthe outside. .The case is placed on the door jamb in a position so thatthe stop piece or latch block 36 restsdirectly in line with one of theopenings l2. As the case and the platform of the part 3 are of the sameheight, the piece 36 extends into the opening. l:2.

.The stop piece is provided with a grooved part 31 nearitsbaseand asloping cone shaped head 38 corresponding and opposite to thebeveledpart of one ofthe tongues, thus permitting the tongue to slidebackward when theyxcontact on the shutting of the door. When the door iscompletely shut the. stop .piece extends upward into the box likeencasement while theitongue is forced forward by its spring into thegroove Of the .stop piece'and locks the door.

The spring .34 is attached at one end to "the part '4 and to the doorjamb by a'screw 39 which extends through "the part 4 and spring into thedoor'jamb. Theother end of the spring is fastenedto the end of thelinkedchain 35.

The free end of the chain extends'through an opening in the case andterminates in a head piece40similar to the stop piece 36. When thespring is contracted the chain is completely inside and the head piecerests on'the outside of the case near the stop piece.

The stoprpiece36is positioned directly in line with the other of theopenings I1 and under the other tongue I3 and functions to-catch itstongue in the same manner as the head piece. However, this head pieceand tongue combination will bar the doorinstead of locking it, the headpiece and chain'running out of the case asthe spring ex- When the springis expanded to its limit, the doorcannot be further opened until theknob is turned to release-the tongue from the head piece. When this isdone, the spring 34 contracts and pulls the chain back into the case 33until the head piece rests in its position on the outside of'case 33.

When the door is closed both tongues are caught in the grooves "31, onein thehead piece and one in the stop piece. When the door is opened fromthe inside the knob must be turned firstin the direction which will pushback the tongue held in the stop or latch piece thus releasing thelocking means and permitting the door to be opened to the extent of thechain. To open the door wide the knob must now be turned in the oppositedirection from which it had previously been turned thus releasing thetongue Thus to open the door slightly opened, and the knob turned in thereverse direction. The door must be held opened between theturnings ofthe knob, otherwise on the second'turning the tongue co-acting with thestop piece is pulled forward by its spring and relocks the door.

The door is opened from the outside by turning the key in the lock whichin turn through the extension and cam releases both tongues and permitsthe door to be opened widely at once.

When the door is shut both tongues are automatically slid into theirgrooves in the head and stop piece respectively and the door is latchedor locked and the chain is ready to function as a barring means. Thusthe normal position is for the door to be chained as Well as locked atall times.

A further modification in structure can be made by replacing the spring34 with a weight or a leaf type of spring.

As the details described in the drawing show only one form of myinvention and since many changes and modifications may be made in thesame invention without changing or departing from the spirit and scopeof the idea, I desire to cover all modifications, forms and embodimentscoming within the language or scope of any one or more of the appendedclaims.

I claim:

1. A locking and barring mechanism for a door consisting of a chain, aspring attached to the chain and to the door jamb, a headpiece on thechain provided with a groove, a stop piece on the door jamb providedwith a groove, two reciprocable movable tongue mechanisms on the door,two spring mechanisms forcing the tongues into the grooves of theheadpiece of the chain and stop piece, roll back means for individuallyreleasing said tongues by reverse movement of said roll back means.

2. A locking and barring mechanism for a door consisting of a chain, aspring attached to the chain and to the door jamb, a headpiece on thechain provided with a groove, a stop piece on the door jamb providedwith a groove, two oppositely movable tongue mechanisms on the door, twospring mechanisms forcing the tongues into the grooves of the headpieceof the chain and stop piece, turning means capable of releasing onlyindividually the tongues by reversing the direction of operation of theturning means.

3. A locking and barring mechanism for a door consisting of two parts,one attached to the door jamb having a chain, a spring attached to thechain and to the part, a headpiece on the chain provided with a groove,a stop piece provided with a groove, and the other said part attached tothe door having two reciprocable tongue mechanisms, two springmechanisms capable of forcing the tongues into the grooves of the headpiece of the chain and the stop piece, reversely movable releasingmechanism operable from the inner side of the door adapted by reversemovement, to, individually and consecutively release the tongues, keyoperated lock means extending through the door from the outer side, aconnecting bar on and operated by said lock means for releasing both thetongues from their grooves practically simultaneously.

4. Locking and barring mechanism for a door comprising one part attachedto the door jamb and the other part attached to the door, the partattached to the door jamb having a fixed head piece with an openingtherein and a limitedly movable head piece having an opening therein,the part attached to the door having a tongue capable of entering theopening in the fixed head piece, a spring forcing the tongue piece intothe opening in the fixed head piece, a second tongue capable of enteringthe opening in the limitedly movable head piece, a second spring forcingthe second tongue into the opening in the limitedly movable head piece,projecting pins on said tongues, arm means pivotally mounted between thepins of the tongues and capable of forcing the tongues backward torelease both the said tongues from said locking and barring means theturning of the arm mechanism in a clockwise direction striking the pinof the first tongue, to push the tongue back and release it from thefixed head piece, and the turning of the arm mechanism counter-clockwisestriking the pin of the second tongue mechanism to push the tongue backand release the tongue from the limitedly movable head piece.

5. Locking and barring mechanism for a door comprising one part attachedto the door jamb and the other part attached to the door, the partattached to the door jamb having a fixed head piece with an openingtherein and a limitedly movable head piece having an opening therein,the part attached to the door having a tongue capable of entering theopening in the fixed head piece, a spring forcing the tongue piece intothe opening in the fixed head piece, a second tongue capable of enteringthe opening in the limitedly movable head piece, a second spring forcingthe second tongue into the opening in the limitedly movable head piece,a projecting part on each of the tongues, arm means pivotally mountedbetween and capable of contacting with said projecting parts on thetongues to force the tongues backward to release them, a secondprojecting part on each of the tongues, a cam pivoted between thetongues and operable against the second projecting parts so as torelease the tongues from their respective head pieces and a lock meansfor operating said cam.

6. A locking and barring mechanism for a door comprising holding partson the door jamb and tongue parts on the door, arm mechanism pivotedbetween and capable of retracting the tongues from the holding parts,knob mechanism attached to the arm mechanism substantially at itspivotal point capable of operating the arm mechanism first in aclockwise direction to retract one tongue and in a counter-clockwisedirection to retract the second tongue, and spring mechanism extendingbetween the door and the tongues and capable of returning the tongues toa normal advanced position when they have been retracted by the armmechanism.

'7. A locking and barring mechanism for a door consisting of a chain, aspring attached to the chain and to the door jamb, a headpiece on thechain provided with a groove, a stop-piece on the door jamb providedwith a groove, two reciprocable tongue mechanisms on the door, twospring mechanisms forcing the tongues into the grooves of the headpieceof the chain and stoppiece, a reversely movable element to individuallyretract said tongues from said grooves.

8. A locking and barring mechanism for a door consisting of a chain, aspring attached to the chain and to the door jamb, a headpiece on thechain provided with a groove, a stop piece on the door jamb providedwith a groove, two reciprocable tongue mechanisms on the door, twospring mechanisms forcing the tongues into the grooves of the headpieceof the chain and stop-piece respectively, a reversely rotatable elementfor successively releasing said tongues by reverse movement.

9. A locking and barring mechanism for a door comprising two parts, oneattached to the door jamb having a chain, a spring attached to thechainiand to the part/a headpiece 'on the chain provided with an openingtherein, a stoppiece provided with 'an openingtherein, and the othersaid part attached to the door having two reciprocable tonguemechanisms, two spring mechanisrnscapable of forcing'the tongues intothe openings of the headpieceiof the chain and the stop piecerespectively, reversely movable releasing mechanism operable from theinner side of the door adapted "by reverse movement to individually andconsecutively release the tongues, key operated lock means extendingthrough the door towards the outer side, a connecting bar on andoperated by said lock means, and a cam means operable by said lock meansto release both of the tongues from said openings practicallysimultaneously.

10. A locking and barring mechanism for a door, comprising two tongueson thedoor, projections on said tongues, a single reversely rotatableelement, a projection on said element, said element with its projectionbeing located intermediate of the projections on the tongues, and

said element with its projection being'located intermediate oftheprojections on the tongues, and co-operating with the projections onthe tongues'to retract the tongues individually and.

successively, a holding element on the door jamb co-acting with one ofthe tongues to hold the door in a'closed position, and a springretracted barring element on the door jamb, said-spring retractedbarring element coacting with the other,

tongue to hold the door in partly opened position.

12. A locking and barring mechanism for a door, comprising two tongueson the door, projection's on'the tongues, a hand-actuated element,

extensions on saidelement, said extensions being adjacent to andcapable'of co-operating with the projections on said tongues, and saidelement being positioned intermediate of the projections on the tonguesand operable in reverse directions to force backward one tongue to thereleasing position by turning in one direction and the other tongue byturning in the opposite direction.

SYLVAN ENGEL.

